CLINICAL AND LABORATORY STUDIES ON RINGWORM IN CATTLE AND GOAT AT SADAR UPAZILLA OF DINAJPUR

Abstract

In this study the prevalence of Dermatophytosis (Ringworm) in cattle and goat for the purpose isolation and identification of the fungi that cause ringworm. The study was conducted in 30 of cattle and 200 goats located in different locations at Sadar Upazilla in Dinajpur District. The study was conducted from April 2017 to June 2018. The results of the present study revealed that 21 (10.5%) out of the 200 examined goat and 6 (20%) out of 30 examined cattle had typical signs of ringworm. Clinically, the lesions of ringworm were alopecia, circumscribed grayish-white, crusty raised lesions. These lesions commonly found in the head, neck, dewlap, and chest area in cattle. In goat, the lesions were most commonly found the ear, nose and around the eyes of the infected animals. Skin scrapings samples were collected from cattle and goat. Than samples were submitted to direct microscopic examination with 15% KOH. The result showed that 5/4 (80%) of cattle and 20/19 (95%) of goat were positive. The presence of spore and hyphae of the fungi among them the positive samples were cultured on mycobiotic agar (Sabouraud's dextrose agar) at 28°C and 37°C for 1 to 3 week. The samples from cattle 4 (80%) grew on the culture media on skin scraping. The while samples from goat 20/19 (95%) of skin samples of the goat gave typical growth of the fungi. Two species of Trichophyton verrucosum and Trichophyton mentagrophytes were isolated from cattle and goats with various rate of infection. In cattle the rate of T. verrucosum and T. mentagrophytes were 3 (75%) and 1(25%), respectively. The rate of T. verrucosum and T. mentagrophytes in goat were 9 (47.36%) and 10 (52.63%), respectively.